Metal-wire terahertz time-domain spectroscopy

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Journal titleApplied Physics Letters
Pages261107-1261107-3; # of pages: 3
Subjectelectrodes; electro-optical effects; infrared spectra; photoconducting switches; submillimetre wave generation; submillimetre wave propagation; submillimetre wave spectra; waveguides; zinc compounds
AbstractTerahertz (THz) pulses propagating on a metal-wire waveguide are used to perform terahertz time-domain spectroscopy of lactose powder dispersed on top of the wire. The THz pulses are generated by a photoconductive switch at one end of the metal wire and are detected at the other end by electro-optic sampling in a ZnTe crystal that can be moved parallel to the axis of the metal wire. A large enhancement in the peak amplitude of the THz signal is observed by contacting the metal wire to one of the electrodes of the photoconductive switch. The propagation characteristics of the THz pulse along the metal wire and near its end are studied. Potential applications of metal-wire terahertz time-domain spectroscopy are discussed.
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NRC number145
NPARC number12338347
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Record identifier876d0e92-080d-4d60-80cd-72ce52858ac1
Record created2009-09-10
Record modified2016-05-09
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